Noiseless chain



March 30 1926.

- R. W. DULL. ET AL NQISELESS CHAIN Filed Jan. 30, 1924 "D w uw m lw mww W a WM 7% mnw p F 7% Patented Mar. 30, 1926 UNITED STATES PATENT porno- RAYMOND w. DULL, or cHIoAeoJnLmors, AND FRANK; oAKns, on INDIANAPOLIS, INDIANA, ASSIGNORS 'ro LINK-BELT conrrnnvmr CHICAGO, ILLINOIS, A oonro- RATION or ILLINOIS.

noIsELEss CHAIN.

'- Application filed. January 30, 1924."-Serial No. 689,421.

To all whom it may concern:

Be it known that we, RAYMOND, W. Dunn and FRANK J. OAKES, being'citizens of the United States and residents,respectively, of Chicago, in the county of Cookand State of Illinois, and of Indianapolis, in the county of Marion and State of Indiana, have invented a certain new and useful Improve;- ment in Noiseless Chains, of which the following is a specification. y

I Our invention relates to an improvement in chains, and has particular relation to a chain wherein each link is made up of: a plurality of laterally aligned link elements joined by transversepins.

One object of our invention is toprovide a chain of this type which shall'be particularly cheap to manufactureand easy to assemble, Another object is to lengthenthe wear of such chain by increasing the bearing area of the relatively moving parts. An-

- other object isto dispense with the necessity of using bushings to join the laterally aligned link parts. pear from time to time in the course of the specification and claims. i I

We illustrate our invention more or less diagrammatically in the 3 accompanying drawlngs, wher'e1nchain with parts cut away, j

Figure 2 is a side elevation withparts broken away;

Figures 3 and 4; are detailed longitudinal vertical sections on an enlargedscale.

Like parts are illustrated by like symbols throughout the specification and drawings. The chain is made up of a plurality'of links which consist, for'eXa-mple, of a flange link element A at each side of said link, said flange element being of relatively thick stock and being shaped with av relatively horizontal bottom A The flange link elements r are mounted upon and connected together by pins B which are necked as at E the outer end of the pin being upset as, at B to secure the flange link thereupon, and to prelyent relative rotation .of pin" and flange lino Intermediate the flange link-sections A, A are a'plurality of thinner link sections C, C, which are herein illustrated as of subv stantially thinnerstock'thanthe flange links Figure 1 is a plan v1ew of a sectionv of the A. :They are also cut away as at C so that In a narrow chain the upsetting of the heads 13 oftheplns B 1s in general suflicient to prevent rotation of said pins in relation to the flange. link sections A. In broader chains, however, we preferably cut away or v shape the pin B positively toprevent its rotation in relation to the links. WVe may,

for example, cutit away at a singlepoint, as shown at B F in Figure 3, or we may cut it away to "n ake'a pluralityof planes,.as'at B in fFigure3, it being necessary, however,-

that at least half, and preferably more than one-half, of the periphery of the pin should be arcuate and concentric, and that no part of the pin shallproject beyond. such are. When the pin is so formed'the'link sections A and C' are-perforated toconformto the pin, and are. thus positively, held against rotation. I i 1 Otherzobj ects will I ap- The pin is made relatively large ini-crosssection to increase its bearing area, and'this bearing area is further increased by having those links or; link section'swhich rotate in relat on to the pin ofthicker stock than 9 those whichido. not. The links formed as above described are, therefore 'joined to-* getherby relatively thi'cklinks". or link sections which are spaced along the pin B by the thinner immovable link sections C. Thus we illustrate pairs of thick link sec.- 7

tions D which a-reformedsubstantially like the link sections 0, save .for their increased thickness, and, like the link sections C, have an intermediate bridge D andpointed teeth D at each end. ,NVhile we illustrate pairs of thick link sections D, under some circumstances we mlght preferto use a s ngle th ck link section in the place of each pair. These thick link sections, which rotate about the pins B as therchain is bent 'in'the course 1 of the rotating link sections Din relationto of itstravel, present to the p'ins a maximum bearing surface. This bearing surface 1s.1n-'

the non-rotating sections C, and by the use of api'n B oflarqe cross section;

:n will. be mil/Zea that while wj tv'eulustratedan operative form of chain, never:

theless many changes may be madeinthe;

" spaced along-"sin size, shape, proportion and relation of parts without departing from the spirit of our invention. J

The useiand operation of our invention e aeiiel eirez, 1 I When'i a n ttli i lfmillelfiil llust a ed is used,- the thick side flange sections pre vent the chain from slipping lateralivfrom the sprockets or. other members lbOHhWlllCh it passes, the sprocket teeth penetrating be tween the pointed teeth of the inner link sections. V I

The chain is particnl'a'rly ,siinpleto m ne factu're since, it coni prises only to separate? parts, vnamely the neckefcFbeai "ngpin, tl1e,' thick jstock side flange element, the thin stock 's eleinents C j and f tlie fthi ck stock ele inentsl). ",Of these the" eleinents U andfD1 may-be made of like" shape and differing only jn thetliic bf ih gstoekx V v 1, bearing" nieiiihers' need be aseaybut 'tlieYiveanoF the" li: I i J 1', ","J'Flm f link sections on the p ns 1s in-in mlzed by the icrease of the; hearing area link nsC which do; not {rotate in 'rel ,tioii to 'the pins maniac asftliin as I sistent "with 5 their sae'ngih; and the" thick link" tie-insets!) iv i-ich don-agate anemia the pinare" off 1ickenstoc'k and are more nu: ineious than tlietl1i'n eleinents C? This inf "t the harin surface ofthefimoviiig phasiz'ed by the usa e the" large ainneteepias and 1am result is a.

t' e en saidihiiifi-nn'er tatable about Said P1118;

simple, easy and." cheaply manufactured "Q'f nnximam-naz V 'claif' j. it

than having links e m coin" rising a pai of rlziti'vlfthik oiiterfilin'k sectio'n's; cross pinsat "each "end of said" sections'and con i-ngithem and inner link' sections pins an of thinner etc it than said o iter section's, "said" pins being "of noii-circular" cross ,se ctionf thef apertures through. the, link sections heing'correspond inglyf' shapedf sa lf pins be cross" section thr'o ,gho'ut" no'r than one" of their peiii'p'h ery, 'a1id heing: entirely encltis'ed -Withinthe f lr'cl'e pf," vliic'h said'ar'cs form part all"said "1i k"seetidns"befng in efctn 'nieiiihers'for the linksy-cniprising linkl sections directly" contacting and rota-ti i", I, i

r -v. '2 p 1r of relat velygthick outer link sections, er pins" at: each end of saiol sections fandconnectin 'ifth'enif and n01i; oiatab1e "in' relatie" the" to, inneri'li-nksections spaced-along sa} lkpi s and ofthinnerstock'th'a-n'said crit er sections and' coi' ne'ction's' between such chain links Icoiiiprising? relatively tl'i'ic'k "link i-"Hi i vi -if" C- sect ons spaced along said cross p ns bee I -ink sections, and-ro- 3. In a chain, chain links comprising a v v ta-ting sectionsfl' d rect. contact with the cross pins j and 'fcQII- pair of relatively thick outer link sections, cross pins at each end of said, sections and connecting thein, -and iion-i'ot atzflolef i'nQrelation thereto, inner link sections spaced along @t tha id outer 'secti0ns',"'1'neans' for preventing relative rotation "of SaICl 'PIDS 'an'dfsaid link; sections, and eonnect1ons "he'tWeen such 'chan'ilinks and rotatable about'such pins, comprising relatively thick link sections spaced along I v said cross pins between said 7 thin inner l nk sections;

5." In fa -chai1i,":'cl1ain links comprising a pairof relatively thick outer link sec'tionsj:

cross'pin's at eacliendof said sections "and connecting tlieni, an d nonrotataxhle in rela tion't-hereto, inner link sections"spaced along. said pins of thinner stock than said outer'sections, said 'pins'loeing 50f non-circu lair crossse ctifo'n fthe ap'ertnres throngh the ln k isections fleeingwcorrespondingly; shaped, a and 'jconnecti'onsf between jsu'ch itcharn links comprisingrelatively thick linkrsectio'ns spaced ifalong said cross' pinsihetyveen said thin inner link sections, and rotatable about' 6.; a chainjbhiriii links 'ompiisinglgaa plurality of link sections, cross pins f passing through each "end of said sections 5 and r 4 connecting them, to forniith'e link, and non-V rotatable in relation-thereto, and means for connecting said links comprising link "sections i'nount'edupon andrrota't able ahoutsaid pins, the pin'enga ging area. of said rotatable 1ink"'sectioi1s1 beingitsubstantiallyv I greater than the pin-engaging area of the nonro- 7. In achain;'chainilinks each comprising a plurality of "laterally spacedflatlink fele-- lne'nts' 0f 5 substantially IV the "same, thickness 7 from endfto end,icross pins passing through each 'end' of 'said' elements and connecting the i'nfto fornrthe link-and non-rotatable. in' relation thereto, and line ans for connect ing" sa'id links comprising i'fitlif' link sections inouii'tecljupon 'and rotatable about and in direct iengagenientfwith said f pins, said rotatable" eleinents being substantially thicker than said non-rotatable element and, theing td n . a c a 8. In a chain, chain links eacliiccniprising a plurality of laterally spaced link elements,

of substantially the same-thickness from end ment with said pins.

vcomprising link sections mounted upon and rotatable about and in direct engagement With said pins, said rotatable elements being substantially thicker than said non-rotatable elements at their points 01': engage- 9; A chain having links each comprising a plurality of laterally spaced link sections, cross pins at each end of said sections and connecting them, said pins being of non circular cross section, all said link sections 7 being in direct cont-act with said pins, thev apertures therethroughconforming to the cross section of thepins, and connecting members for the links comprisinglink sections directly contacting and rotatable about the pins of the links.

Signed at Chicago, Illi of January, 1924.

' RAYMOND W.

ois, this 12thday DULL.

Signed at Indianapolis, Indiana, this'18 Y day of Jan. 1924;.

.i FRANK J. OAKES. 

